Quote:
Originally Posted by skyking
I see that but I am hard pressed to believe it stays attached that far aft. My car (that car) has a Cd of .38.
I'd think it would be coming apart sooner than that, maybe halfway between rear window edge and side door edge.
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The longitudinal vortices will tend to hold the centerline flow attached down the contour,so the photo is a bit deceiving.
Your contour hits 22-23 degrees at the top molding of the backlight and this is where the boundary layer will be compromised.
The SMART Car sticks closer to the 'Template' and scores Cd 0.38 on a much shorter car.
Koenig-Kamm,at the FKFS was able to achieve Cd 0.14 on a Cd 0.20 car just by lofting the roofline up to the 'Template,as well the same for the sides.
NOTE: Kamm DID include a diffuser,something the other car's body lacked.